I want to gift things. Where's the button

Trying to gift my GF a 12 month subscription, without giving her my card details, why can I not do this? She added it to her wish but it’s not showing up as on her wish list from my computer. Make spending money easier for customers please. If I could find a button to press to send her the subscription as a gift I would have done that, it should be an option without it being on their wish list. Please let me pay you blizzard!